Document Detail


On-line complexation/preconcentration system for the determination of lead in wine by inductively coupled plasma-atomic emission spectrometry with ultrasonic nebulization.
MedLine Citation:
PMID:  11601476     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
An on-line lead preconcentration and determination system implemented with inductively coupled plasma-atomic emission spectrometry (ICP-AES) with ultrasonic nebulization (USN) in association with flow injection was studied. For the preconcentration of lead, a Pb-quinolin-8-ol complex was formed on-line at pH 6.8 and retained on Amberlite XAD-16 resin. The lead was removed from the microcolumn by countercurrent elution with nitric acid. A total enhancement factor of 225 was obtained with respect to ICP-AES with pneumatic nebulization (15.0 for USN and 15.0 for the column). The detection limit for Pb for the preconcentration of a 10 mL wine sample was 0.15 microg/L. The precision for 10 replicate determinations at a Pb level of 25 microg/L was a relative standard deviation of 2.5%, calculated from the peak heights obtained. The calibration graph obtained by using the preconcentration system for lead was linear with a correlation coefficient of 0.9995 for levels near the detection limit up to > or = 1000 microg/L. The method was successfully applied to the determination of lead in wine samples.
Authors:
R G Wuilloud; A H González; E J Marchevsky; R A Olsina; L D Martinez
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of AOAC International     Volume:  84     ISSN:  1060-3271     ISO Abbreviation:  J AOAC Int     Publication Date:    2001 Sep-Oct
Date Detail:
Created Date:  2001-10-16     Completed Date:  2002-03-05     Revised Date:  2008-03-17    
Medline Journal Info:
Nlm Unique ID:  9215446     Medline TA:  J AOAC Int     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1555-60     Citation Subset:  IM    
Affiliation:
National University of San Luis, Faculty of Chemistry, Department of Analytical Chemistry, Argentina.
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MeSH Terms
Descriptor/Qualifier:
Hydrogen-Ion Concentration
Indicators and Reagents
Lead / analysis*
Online Systems
Reproducibility of Results
Spectrophotometry, Atomic
Ultrasonics
Wine / analysis*
Chemical
Reg. No./Substance:
0/Indicators and Reagents; 7439-92-1/Lead

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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